Sony SS-MF550H 3-Way Floorstanding Speakers (Pair) (Discontinued by Manufacturer) 3-way, ported (bass-reflex) floorstanding speaker with 150-watt maximum power handling, 8-ohm speaker impedance 3.25-inch and 8-inch Kevlar/HOP (high strength, low weight, and low resonance) drivers and a 1-inch tweeter Nano-Fine balanced-dome tweeter rated to 50 kHz; bass response extends to 45 Hz Includes 2 lengths of 8-foot speaker cable and removable speaker grilles Measures 9.5 x 33.5 x 10 inches (W x H x D)